Improvement in friction-clutches



A. M, snow N. u

Friction-Clutches Patented May 5.1`8,7`4.

' Vl Waaraan'.

UNITED STATES PATENT OFFICEo ALFRED M. BROWN, OF PAWTUCKET, RHODE ISLAND.

IMPROVEMENT IN FRlCTlON-CLUTCHES.

, Specification forming part of Letters Patent No. 150,653, dated May 5, 1874; application filed April-11, 1874. Y

To all whom it may concern:

Be itknown that I, ALFRED M. BROWN, of Pawtucket, in the county of Providence and State of Rhode Island, have invented a new and valuable- Improvement in Friction Clutches or Pulleys; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation ofthe same, reference being had to the annexed drawings, making a part of this speciiication, and to the letters and gures of refA erence marked thereon.

Figure 1 of the drawing isa representation of my friction-clutch, and Fig. 2is a sectional View of the same. Fig. 3 is a detail section of the same. v

This invention has relation to pulleys which can be made fast or loose on their shafts by means of friction clutches or carriers. It consists in the combination of a spring with toggles,`slide`clutch, and wedge, as will be hereinafter more fully described. l

In the annexed drawing, JA designa-tes a pulley which is loosely applied onv a shaft, B, having its bearings in hangers or standards J. Inside of the rim of .this pulley is applied a friction-clutch, C, which is nearly a complete' circle, and to which one end of a diametrical bar, C', is rigidly secured. This bar C is secured to the shaft 13,' so as to turn with it. The two free ends of the clutch are connected by toggles b b 4to theTshaped head b of a slide, L,which slide, is guided in a slot made through the bar C', so that it can receive a radial movement. Between the slide L and the hub of the bar C is a wedge, w, which is movable in a direction with the length of the shaft B, and which is formed on or secured to a circular grooved hub, D. This hub D is applied on shaftB by means of a spline and keyseat, so that it is allowed to receive endwise movement, which movement is imparted to it by means of a yoked lever, E, pivoted at g, i

and providedwith pins c c, which enter the said circulargroove. l/Vhen the lever G is moved to the position indicated in Fig. 2, the wedge 'w will force the slide L toward the circumference of the pulley A, and cause the toggles b b to expand the clutch O against the inner side of the rim of the pulley, thereby iirlnly clutching the latter on its shaft. When the wedge 'w is drawn back the clutch C will i "hereunto subscribed my name iu'the presence of two witnesses.

ALFRED MATHIS BROWN. Witnesses:

JOSHUA S. WHITE, FRED. H. WHITE. 

